Malicious PDF — malware analysis report

Static analysis result for SHA-256 23931068f6f4a235…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 22:48:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7cd952b38a45bb893d6b30f5619ade32 SHA-1: 2c90cd309cee4ea95582f9bd15efd2fb12280a93 SHA-256: 23931068f6f4a23542881532a1ec5377fecbb849757613d17fb047a5e109bb50
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to trick users into interacting with it, likely to lead them to download malicious content or exploit a vulnerability. The embedded URLs point to resources related to game cheats and hacks, suggesting a lure for users seeking such content. While no scripts were directly extracted, the PDF structure and ML classification indicate malicious intent, possibly involving embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-spin-and-coins-links-home-game-hack
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-coin-master-coins-2021_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-32-hack-apk_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-reviews_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spins-5-10-2021_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-game-hack-kaise-kare_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spin-2912-2021_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/mcpe-hack-client_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-root-hack_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/hack-coin-master-site-rssingcom_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-give-robux-on-mobile_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-do-you-download-minecraft-for-free_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/minecraft-pe-texture-packs-free-download_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/minecraft-114-4-download_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5e.bin
8aba465716d045ebe4cf33ab535a0a2131442cc0ebcc9b90fcc3075097874c00		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5E 25624 bytes
font_01_sfnt_off000086d1.bin
c6f1255b5246b10a2381080087e328848ca3d63cb104c3d5d5a1d34eeed5229c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D1 18492 bytes

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